Whiting Terry L, Drain Mairead E, Rasali Drona P
Office of the Chief Veterinarian, Manitoba Agriculture Food and Rural Initiatives, Winnipeg, Manitoba.
Can Vet J. 2007 Feb;48(2):148-54.
This observational study was conducted to identify the cause of death and load level factors associated with mortality in 1 090 733 Manitoba broiler chickens transported to slaughter in spring and early summer. Death loss in transit was 0.346% and accounted for 19% of the total carcass condemnation. The death loss pattern was clearly bimodal, with a low death loss in 180 of 198 shipments. Cumulative death loss during the growing phase of production was consistently associated with increased transport mortalities in load level models and when comparing high death loss with low death loss truckloads. High ambient temperature at the time of slaughter and loading density of the truck were the major factors associated with exceptional death loss.
本观察性研究旨在确定1090733只在春季和初夏运往屠宰场的曼尼托巴肉鸡的死亡原因以及与死亡率相关的装载水平因素。运输过程中的死亡率为0.346%，占胴体总拒收率的19%。死亡损失模式明显呈双峰分布，198批货物中有180批死亡损失较低。在生长阶段的累计死亡损失在装载水平模型中以及在比较高死亡损失和低死亡损失的卡车时，始终与运输死亡率增加相关。屠宰时的高环境温度和卡车的装载密度是与异常死亡损失相关的主要因素。
